/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s1iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:09:53,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:09:53,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:09:53,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:09:53,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:09:53,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:09:53,080 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:09:53,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:09:53,084 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:09:53,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:09:53,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:09:53,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:09:53,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:09:53,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:09:53,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:09:53,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:09:53,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:09:53,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:09:53,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:09:53,099 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:09:53,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:09:53,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:09:53,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:09:53,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:09:53,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:09:53,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:09:53,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:09:53,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:09:53,124 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 23:09:53,140 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:09:53,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:09:53,142 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:09:53,142 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:09:53,142 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:09:53,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:09:53,143 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:09:53,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:09:53,143 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:09:53,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:09:53,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:09:53,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:09:53,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:09:53,144 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:09:53,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:09:53,145 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:09:53,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:09:53,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:09:53,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:09:53,145 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:09:53,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:09:53,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:09:53,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:09:53,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:09:53,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:09:53,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:09:53,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:09:53,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:09:53,147 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:09:53,148 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:09:53,466 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:09:53,489 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:09:53,496 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:09:53,497 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:09:53,498 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:09:53,499 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s1iff.c [2020-07-21 23:09:53,572 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6e48acf9/8950173d5b12451fb6590fb1241b3f95/FLAG07e83b152 [2020-07-21 23:09:53,998 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:09:53,999 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1iff.c [2020-07-21 23:09:54,007 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6e48acf9/8950173d5b12451fb6590fb1241b3f95/FLAG07e83b152 [2020-07-21 23:09:54,372 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6e48acf9/8950173d5b12451fb6590fb1241b3f95 [2020-07-21 23:09:54,383 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:09:54,387 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:09:54,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:09:54,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:09:54,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:09:54,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:09:54" (1/1) ... [2020-07-21 23:09:54,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d61c383 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:54, skipping insertion in model container [2020-07-21 23:09:54,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:09:54" (1/1) ... [2020-07-21 23:09:54,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:09:54,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:09:54,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:09:54,653 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:09:54,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:09:54,727 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:09:54,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:54 WrapperNode [2020-07-21 23:09:54,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:09:54,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:09:54,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:09:54,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:09:54,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:54" (1/1) ... [2020-07-21 23:09:54,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:54" (1/1) ... [2020-07-21 23:09:54,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:54" (1/1) ... [2020-07-21 23:09:54,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:54" (1/1) ... [2020-07-21 23:09:54,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:54" (1/1) ... [2020-07-21 23:09:54,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:54" (1/1) ... [2020-07-21 23:09:54,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:54" (1/1) ... [2020-07-21 23:09:54,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:09:54,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:09:54,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:09:54,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:09:54,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:09:54,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:09:54,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:09:54,988 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:09:54,988 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:09:54,989 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:09:54,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:09:54,989 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:09:54,989 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:09:54,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:09:54,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:09:54,990 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 23:09:54,990 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:09:54,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 23:09:54,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 23:09:54,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 23:09:54,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 23:09:54,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 23:09:54,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:09:54,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:09:55,444 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:09:55,445 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 23:09:55,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:09:55 BoogieIcfgContainer [2020-07-21 23:09:55,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:09:55,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:09:55,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:09:55,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:09:55,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:09:54" (1/3) ... [2020-07-21 23:09:55,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cdf6c9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:09:55, skipping insertion in model container [2020-07-21 23:09:55,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:09:54" (2/3) ... [2020-07-21 23:09:55,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cdf6c9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:09:55, skipping insertion in model container [2020-07-21 23:09:55,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:09:55" (3/3) ... [2020-07-21 23:09:55,461 INFO L109 eAbstractionObserver]: Analyzing ICFG s1iff.c [2020-07-21 23:09:55,472 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:09:55,480 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:09:55,494 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:09:55,520 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:09:55,520 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:09:55,520 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:09:55,520 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:09:55,521 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:09:55,521 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:09:55,521 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:09:55,521 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:09:55,540 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-21 23:09:55,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 23:09:55,546 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:09:55,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:09:55,548 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:09:55,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:09:55,556 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-21 23:09:55,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:09:55,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034099707] [2020-07-21 23:09:55,568 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:09:55,692 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:09:55,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:09:55,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 23:09:55,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:09:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:09:55,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:09:55,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034099707] [2020-07-21 23:09:55,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:09:55,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 23:09:55,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284728638] [2020-07-21 23:09:55,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 23:09:55,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:09:55,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 23:09:55,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:09:55,758 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-07-21 23:09:55,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:09:55,789 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-07-21 23:09:55,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 23:09:55,791 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-21 23:09:55,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:09:55,801 INFO L225 Difference]: With dead ends: 54 [2020-07-21 23:09:55,801 INFO L226 Difference]: Without dead ends: 25 [2020-07-21 23:09:55,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:09:55,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-21 23:09:55,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-21 23:09:55,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 23:09:55,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-21 23:09:55,855 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-07-21 23:09:55,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:09:55,856 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-21 23:09:55,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 23:09:55,856 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-21 23:09:55,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 23:09:55,857 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:09:55,857 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:09:56,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:09:56,060 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:09:56,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:09:56,061 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-07-21 23:09:56,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:09:56,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728990669] [2020-07-21 23:09:56,063 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:09:56,137 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:09:56,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:09:56,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:09:56,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:09:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:09:56,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:09:56,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728990669] [2020-07-21 23:09:56,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:09:56,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:09:56,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367710428] [2020-07-21 23:09:56,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:09:56,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:09:56,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:09:56,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:09:56,204 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 4 states. [2020-07-21 23:09:56,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:09:56,281 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-21 23:09:56,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:09:56,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-21 23:09:56,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:09:56,284 INFO L225 Difference]: With dead ends: 40 [2020-07-21 23:09:56,284 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 23:09:56,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:09:56,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 23:09:56,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-21 23:09:56,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 23:09:56,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-21 23:09:56,295 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-21 23:09:56,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:09:56,295 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-21 23:09:56,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:09:56,295 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-21 23:09:56,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 23:09:56,296 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:09:56,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:09:56,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:09:56,512 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:09:56,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:09:56,513 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-21 23:09:56,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:09:56,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952088741] [2020-07-21 23:09:56,515 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:09:56,582 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:09:56,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:09:56,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 23:09:56,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:09:56,698 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-21 23:09:56,699 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 23:09:56,723 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 23:09:56,725 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 23:09:56,727 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-07-21 23:09:56,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 23:09:56,768 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-07-21 23:09:56,769 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 23:09:56,787 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 23:09:56,788 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 23:09:56,789 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-07-21 23:09:56,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 23:09:56,981 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 23:09:56,982 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2020-07-21 23:09:56,984 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 23:09:57,030 INFO L624 ElimStorePlain]: treesize reduction 24, result has 65.7 percent of original size [2020-07-21 23:09:57,037 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-21 23:09:57,037 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:46 [2020-07-21 23:09:57,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 23:09:57,135 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 23:09:57,136 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 29 [2020-07-21 23:09:57,138 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 23:09:57,150 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 23:09:57,152 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 23:09:57,152 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:53, output treesize:10 [2020-07-21 23:09:57,176 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:09:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:09:57,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:09:57,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:09:59,846 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 23:09:59,891 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 23:09:59,908 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 23:09:59,909 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 50 [2020-07-21 23:09:59,926 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 23:09:59,938 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 23:09:59,941 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 44 [2020-07-21 23:09:59,946 INFO L440 ElimStorePlain]: Different costs {0=[v_arrayElimCell_9], 1=[v_arrayElimCell_8]} [2020-07-21 23:09:59,954 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2020-07-21 23:09:59,955 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 23:09:59,962 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 23:09:59,969 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 67 [2020-07-21 23:09:59,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:09:59,975 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 23:09:59,991 INFO L624 ElimStorePlain]: treesize reduction 56, result has 8.2 percent of original size [2020-07-21 23:09:59,991 INFO L544 ElimStorePlain]: Start of recursive call 3: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 23:09:59,993 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 23:09:59,994 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 23:10:00,003 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 23:10:00,005 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 23:10:00,005 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:104, output treesize:9 [2020-07-21 23:10:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:10:00,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952088741] [2020-07-21 23:10:00,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:10:00,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-07-21 23:10:00,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36763877] [2020-07-21 23:10:00,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 23:10:00,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:10:00,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 23:10:00,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=274, Unknown=2, NotChecked=0, Total=342 [2020-07-21 23:10:00,039 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 19 states. [2020-07-21 23:10:01,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:10:01,017 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-07-21 23:10:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 23:10:01,017 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2020-07-21 23:10:01,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:10:01,018 INFO L225 Difference]: With dead ends: 50 [2020-07-21 23:10:01,019 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 23:10:01,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=139, Invalid=561, Unknown=2, NotChecked=0, Total=702 [2020-07-21 23:10:01,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 23:10:01,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-07-21 23:10:01,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 23:10:01,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-21 23:10:01,027 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-07-21 23:10:01,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:10:01,028 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-21 23:10:01,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 23:10:01,028 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-21 23:10:01,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 23:10:01,029 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:01,029 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:10:01,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:01,240 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:01,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:01,242 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-07-21 23:10:01,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:01,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503737386] [2020-07-21 23:10:01,243 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:01,312 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:10:01,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:10:01,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 23:10:01,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:10:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:10:01,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:10:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:10:01,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503737386] [2020-07-21 23:10:01,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:10:01,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 23:10:01,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752195576] [2020-07-21 23:10:01,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 23:10:01,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:10:01,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 23:10:01,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 23:10:01,421 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 9 states. [2020-07-21 23:10:01,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:10:01,619 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-21 23:10:01,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 23:10:01,622 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-21 23:10:01,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:10:01,624 INFO L225 Difference]: With dead ends: 45 [2020-07-21 23:10:01,624 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 23:10:01,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 23:10:01,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 23:10:01,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-21 23:10:01,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 23:10:01,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-21 23:10:01,633 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-21 23:10:01,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:10:01,634 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-21 23:10:01,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 23:10:01,634 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-21 23:10:01,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 23:10:01,635 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:01,635 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:10:01,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:01,851 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:01,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-07-21 23:10:01,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:01,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499998258] [2020-07-21 23:10:01,853 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:01,903 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:10:01,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:10:01,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 23:10:01,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:10:01,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:10:01,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:10:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:10:02,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499998258] [2020-07-21 23:10:02,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:10:02,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 23:10:02,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874347801] [2020-07-21 23:10:02,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 23:10:02,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:10:02,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 23:10:02,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 23:10:02,004 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2020-07-21 23:10:02,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:10:02,156 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-21 23:10:02,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 23:10:02,157 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-21 23:10:02,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:10:02,159 INFO L225 Difference]: With dead ends: 49 [2020-07-21 23:10:02,159 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 23:10:02,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:10:02,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 23:10:02,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-21 23:10:02,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 23:10:02,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-21 23:10:02,168 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-21 23:10:02,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:10:02,168 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-21 23:10:02,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 23:10:02,169 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-21 23:10:02,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 23:10:02,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:02,170 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:10:02,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:02,387 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:02,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:02,387 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-07-21 23:10:02,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:02,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582429742] [2020-07-21 23:10:02,389 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:02,438 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:10:02,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 23:10:02,439 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 23:10:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 23:10:02,459 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 23:10:02,488 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 23:10:02,488 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 23:10:02,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:02,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:10:02 BoogieIcfgContainer [2020-07-21 23:10:02,741 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 23:10:02,743 INFO L168 Benchmark]: Toolchain (without parser) took 8357.86 ms. Allocated memory was 145.2 MB in the beginning and 245.9 MB in the end (delta: 100.7 MB). Free memory was 103.6 MB in the beginning and 106.9 MB in the end (delta: -3.4 MB). Peak memory consumption was 97.3 MB. Max. memory is 7.1 GB. [2020-07-21 23:10:02,744 INFO L168 Benchmark]: CDTParser took 0.67 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 23:10:02,744 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.10 ms. Allocated memory is still 145.2 MB. Free memory was 103.2 MB in the beginning and 92.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-07-21 23:10:02,745 INFO L168 Benchmark]: Boogie Preprocessor took 182.65 ms. Allocated memory was 145.2 MB in the beginning and 203.9 MB in the end (delta: 58.7 MB). Free memory was 92.3 MB in the beginning and 181.2 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-21 23:10:02,746 INFO L168 Benchmark]: RCFGBuilder took 537.32 ms. Allocated memory is still 203.9 MB. Free memory was 181.2 MB in the beginning and 164.0 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-07-21 23:10:02,747 INFO L168 Benchmark]: TraceAbstraction took 7289.96 ms. Allocated memory was 203.9 MB in the beginning and 245.9 MB in the end (delta: 41.9 MB). Free memory was 164.0 MB in the beginning and 106.9 MB in the end (delta: 57.1 MB). Peak memory consumption was 99.0 MB. Max. memory is 7.1 GB. [2020-07-21 23:10:02,751 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.67 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 340.10 ms. Allocated memory is still 145.2 MB. Free memory was 103.2 MB in the beginning and 92.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 182.65 ms. Allocated memory was 145.2 MB in the beginning and 203.9 MB in the end (delta: 58.7 MB). Free memory was 92.3 MB in the beginning and 181.2 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 537.32 ms. Allocated memory is still 203.9 MB. Free memory was 181.2 MB in the beginning and 164.0 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7289.96 ms. Allocated memory was 203.9 MB in the beginning and 245.9 MB in the end (delta: 41.9 MB). Free memory was 164.0 MB in the beginning and 106.9 MB in the end (delta: 57.1 MB). Peak memory consumption was 99.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=7, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 1 [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=2, sum={2:0}] [L30] COND TRUE i